[alsa-devel] snd_usb_audio - siberia elite prism soundcard issues
Daniel
dferradal at gmail.com
Sat Mar 14 15:33:02 CET 2015
2015-03-14 7:10 GMT+01:00 Raymond Yau <superquad.vortex2 at gmail.com>:
>
> >> >> >> >> > >
> >> >> >> >> > > > amixer: Control hw:2 element read error: Invalid argument
> >> >> >> >> > > > usb 1-1.3: 10:0: cannot get min/max values for control 3
> (id 10)
> >> >> >> >> > > > usb 1-1.3: 2:1: cannot get freq at ep 0x1
> >> >> >>
> >> >> >> numid=5,iface=MIXER,name='PCM Volume' ;
> type=INTEGER,access=rw------,values=2,min=0,max=1,step=0 amixer: Control
> hw:2 element read error: Invalid argument
> >> >> >>
> >> >> >> numid=6,iface=MIXER,name='PCM Volume',index=1 ;
> type=INTEGER,access=rw------,values=1,min=0,max=1,step=0 amixer: Control
> hw:2 element read error: Invalid argument
> >> >> >>
> >> >> >> numid=7,iface=MIXER,name='PCM Volume',index=2 ;
> type=INTEGER,access=rw------,values=1,min=0,max=1,step=0 amixer: Control
> hw:2 element read error: Invalid argument
> >> >> >>
> >> >> >> numid=8,iface=MIXER,name='PCM Volume',index=3 ;
> type=INTEGER,access=rw------,values=1,min=0,max=1,step=0 amixer: Control
> hw:2 element read error: Invalid argument
> >> >> >>
> >> >> >> numid=9,iface=MIXER,name='PCM Volume',index=4 ;
> type=INTEGER,access=rw------,values=1,min=0,max=1,step=0 amixer: Control
> hw:2 element read error: Invalid argument
> >> >> >>
>
> >
> > In case this can be of any useful info, in the form of unknown controls
> reported by the lsusb output, manufacturer software in other OS has
> controls for:
> >
> > * dolby surround activation (off and on).
> > * microphone input volume (which works fine now) in snd_usb_audio
> > * microphone input "compression" (supposedly to keep input within
> certain non distorting levels)
> > * input noise reduction (off and on too)
> > * micro retro feedback volume
> > * equalizer.
>
> You need to find out the terminals of two inputs if you want to know the
> function of this mixer unit
>
> > bUnitID 10
> > bNrInPins 2
> > baSourceID( 0) 9
> > baSourceID( 1) 1
>
> There are debug output in the system log when you compiled the driver with
> debug option
>
> usb_audio_dbg(state->chip, "[%d] MU [%s] ch = %d, val = %d/%d\n",
> cval->head.id, kctl->id.name, cval->channels, cval->min, cval->max);
>
> Is the suffix "Volume" correct since it may be just a mute switch ?
>
> 3.13.4 Mixer Unit
> The Mixer Unit (MU) transforms a number of logical input channels into a
> number of logical output channels. The input channels are grouped into one
> or more audio channel clusters. Each cluster enters the Mixer Unit through
> an Input Pin. The logical output channels are grouped into one audio
> channel cluster and leave the Mixer Unit through a single Output Pin. Every
> input channel can virtually be mixed into all of the output channels. If n
> is the total number of input ixer channels and m is the number of output
> channels, then there is a two-dimensional array (n · m) of M Controls in
> the Mixer Unit.
>
> Not all of these Controls have to be physically implemented. Some Controls
> can have a fixed setting and be non-programmable.
>
> The Mixer Unit Descriptor reports which Controls are programmable in the
> bmControls bitmap field. Using this model, a permanent connection can be
> implemente d by reporting the Control as non-programmable in the bmControls
> bitmap and by returning a nnection can be implemented by Control setting of
> 0 dB when requested. Likewise, a missing (muting) co reporting the Control
> as non-programmable in the bmControls bitmap and by returning a Control
> setting of –∞ dB. A Mixer Unit MUST respond to the appropriate Get Request
> to allow the Host to retrieve the actual settings on each of the (n · m)
> Mixer Controls.
>
> 4.7.2.6 Mixer Unit Descriptor
>
> The bmMixerControls field stores the bit array row after row where the MSb
> of the first byte corresponds to the connection between input channel 1 and
> output channel 1. If (n · m) is not an integer multiple of 8, the bit array
> is padded with zeros until an integer number of bytes is occupied.
>
> The number of bytes used to store the bit array, N, can be calculated as
> follows:
> IF ((n * m) MOD 8) <> 0 THEN
> N = ((n * m) DIV 8) + 1
> ELSE
> N = ((n * m) DIV 8)
>
> The bmControls field contains a set of bit pairs, indicating which
> Controls are present and what their capabilities are. If a Control is
> present, it must be Host readable. If a certain Control is not present then
> the bit pair must be set to 0b00. If a Control is present but read-only,
> the bit pair must be set to 0b01. If a Control is also Host programmable,
> the bit pair must be set to 0b11. The value 0b10 is not allowed.
>
> For uac2
>
> At location 11 + p + N
>
> D1..0: Cluster Control
> D3..2: Underflow Control
> D5..4: Overflow Control
> D7..6: Reserved. Must be set to 0.
>
> static void build_mixer_unit_ctl(struct mixer_build *state,
> struct uac_mixer_unit_descriptor *desc,
> int in_pin, int in_ch, int unitid,
> struct usb_audio_term *iterm)
> {
> struct usb_mixer_elem_info *cval;
> unsigned int num_outs = uac_mixer_unit_bNrChannels(desc);
> unsigned int i, len;
> struct snd_kcontrol *kctl;
> const struct usbmix_name_map *map;
>
> map = find_map(state, unitid, 0);
> if (check_ignored_ctl(map))
> return;
>
> cval = kzalloc(sizeof(*cval), GFP_KERNEL);
> if (!cval)
> return;
>
> snd_usb_mixer_elem_init_std(&cval->head, state->mixer, unitid);
> cval->control = in_ch + 1; /* based on 1 */
> cval->val_type = USB_MIXER_S16;
> for (i = 0; i < num_outs; i++) {
> __u8 *c = uac_mixer_unit_bmControls(desc, state->mixer->protocol);
>
> if (check_matrix_bitmap(c, in_ch, i, num_outs)) {
> cval->cmask |= (1 << i);
> cval->channels++;
> }
> }
>
> /* get min/max values */
> get_min_max(cval, 0);
>
> kctl = snd_ctl_new1(&usb_feature_unit_ctl, cval);
> if (!kctl) {
> usb_audio_err(state->chip, "cannot malloc kcontrol\n");
> kfree(cval);
> return;
> }
> kctl->private_free = snd_usb_mixer_elem_free;
>
> len = check_mapped_name(map, kctl->id.name, sizeof(kctl->id.name));
> if (!len)
> len = get_term_name(state, iterm, kctl->id.name,
> sizeof(kctl->id.name), 0);
> if (!len)
> len = sprintf(kctl->id.name, "Mixer Source %d", in_ch + 1);
> append_ctl_name(kctl, " Volume");
>
> usb_audio_dbg(state->chip, "[%d] MU [%s] ch = %d, val = %d/%d\n",
> cval->head.id, kctl->id.name, cval->channels, cval->min, cval->max);
> snd_usb_mixer_add_control(&cval->head, kctl);
> }
>
Hello,
The device has 3 inputs as you will see in the picture I attach.
Two analog inputs and 1 digital:
* Analog micro
* Analog headphones
* USB input <-- This is how the headphones are plugged to have dolby
surround enabled and some of illuminations settings (the headphones can
have multiple illumination colors, I mention this as means to be able to
identify possible unknown switches the device may have).
--
I also tried with your mixer.c modifications and definetly my knowledge
right now is not enough to get it to compile correctly, even under 4.0rc3
kernel, dumps many errors:
In file included from include/linux/usb.h:18:0,
from sound/usb/mixer.c:50:
sound/usb/mixer.c: In function ‘build_mixer_unit_ctl’:
sound/usb/mixer.c:1536:61: error: ‘ich’ undeclared (first use in this
function)
usb_audio_info(state->chip, " bmControls [%d,%d] : %x\n", ich, och, *c);
^
include/linux/device.h:1107:58: note: in definition of macro ‘dev_info’
#define dev_info(dev, fmt, arg...) _dev_info(dev, fmt, ##arg)
^
sound/usb/mixer.c:1536:3: note: in expansion of macro ‘usb_audio_info’
usb_audio_info(state->chip, " bmControls [%d,%d] : %x\n", ich, och, *c);
^
sound/usb/mixer.c:1536:61: note: each undeclared identifier is reported
only once for each function it appears in
usb_audio_info(state->chip, " bmControls [%d,%d] : %x\n", ich, och, *c);
^
include/linux/device.h:1107:58: note: in definition of macro ‘dev_info’
#define dev_info(dev, fmt, arg...) _dev_info(dev, fmt, ##arg)
^
sound/usb/mixer.c:1536:3: note: in expansion of macro ‘usb_audio_info’
usb_audio_info(state->chip, " bmControls [%d,%d] : %x\n", ich, och, *c);
^
sound/usb/mixer.c:1536:66: error: ‘och’ undeclared (first use in this
function)
usb_audio_info(state->chip, " bmControls [%d,%d] : %x\n", ich, och, *c);
^
include/linux/device.h:1107:58: note: in definition of macro ‘dev_info’
#define dev_info(dev, fmt, arg...) _dev_info(dev, fmt, ##arg)
^
sound/usb/mixer.c:1536:3: note: in expansion of macro ‘usb_audio_info’
usb_audio_info(state->chip, " bmControls [%d,%d] : %x\n", ich, och, *c);
^
sound/usb/mixer.c: In function ‘parse_audio_mixer_unit’:
sound/usb/mixer.c:1616:6: error: ‘ich_has_control’ undeclared (first use in
this function)
ich_has_control = 0;
^
sound/usb/mixer.c:1619:8: error: ‘ich_has_controls’ undeclared (first use
in this function)
if (ich_has_controls)
^
sound/usb/mixer.c: At top level:
sound/usb/mixer.c:1623:2: error: expected identifier or ‘(’ before ‘}’ token
}
^
sound/usb/mixer.c:1624:2: error: expected identifier or ‘(’ before ‘return’
return 0;
^
sound/usb/mixer.c:1625:1: error: expected identifier or ‘(’ before ‘}’ token
}
^
sound/usb/mixer.c: In function ‘parse_audio_mixer_unit’:
sound/usb/mixer.c:1622:3: warning: control reaches end of non-void function
[-Wreturn-type]
}
^
Should you need anything else I'll try my best.
--
*Daniel Ferradal*
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